The outer grey circle is the Earth's penumbra, and the inner black circle is the umbra. Any part of the Moon which
passes within the black circle will be unilluminated, while any part within the grey circle will appear less bright
than usual.

Animated simulation Still image of key moments Diagram of Moon's path

Zenith up North up

There will be a penumbral eclipse of the Moon, visible from Ashburn in the south-eastern sky. The Moon will lie 5° above the horizon at the moment of greatest eclipse.

The eclipse will last from 19:05 until 22:14, and maximum eclipse will occur at 20:40 (all times given in Ashburn time).

A penumbral eclipse

Like other lunar eclipses, penumbral eclipses occur whenever the Earth passes
between the Moon and Sun, such that it obscures the Sun's light and casts a
shadow onto the Moon's surface. But unlike other kinds of eclipses, they are
extremely subtle events to observe.

In a penumbral eclipse the Moon passes through an outer region of the Earth's
shadow called the penumbra. This is the outer part of the Earth's shadow, in
which the Earth appears to cover part of the Sun's disk, but not all of it (see
diagram below). As a result, the Moon's brightness will begin to dim, as it is
less strongly illuminated by the Sun, but the whole of the Sun's disk will
remain illuminated to some degree.

Although the Moon's light dims considerably during a penumbral eclipse, this is
only perceptible to those with very astute vision, or in carefully controlled
photographs.

Moreover, on this occasion no more than 40% of the Moon's
face will pass within the Earth's penumbra, even at the moment of greatest
eclipse, making it especially difficult to notice any reduction in the Moon's
brightness.

The geometry of a lunar eclipse. Within the penumbra, the Earth covers some fraction of the Sun's disk, but not all of
it. In the umbra, the Earth covers the entirity of the Sun's disk. Any parts of the Moon's surface that lie within
the Earth's umbra will appear unilluminated.
Image courtesy of F. Sogumo.

Visibility of the eclipse

Eclipses of the Moon are visible anywhere where the Moon is above the horizon
at the time. Since the geometry of lunar eclipses requires that the Moon is
directly opposite the Sun in the sky, the Moon can be seen above the horizon
anywhere where the Sun is beneath the horizon. The map below shows where the
eclipse of August 5 will be visible.

Source

You may embed the map above in your own website. It is licensed under the Creative Commons Attribution 3.0 Unported license, which allows you to copy and/or modify it, so long as you credit In-The-Sky.org.